Invoice Reduction-Vendor error: only a higher amount invoiced is allowed

Question

Hi,
I am trying to replicate the "Invoice Reduction" Scenario (for both Price and Quantity Variance scenario).
1) Created a PO for 25 PCE and made GR for 10 PCE (10 USD/PCE).
2) Entering Invoice for 25 PCE and Amount 2500 USD and I have selected correction ID as Vendor Error: Reduce Invoice. So when the document is posted system should generates the Invoice document and Credit memo.
But I am getting the error as mentioned in subject.
Please find below the Error description:
Vendor error: only a higher amount invoiced is allowed
Message no. M8582
Diagnosis
The item amount in the invoice of          100.00 is smaller than the item amount of        2,500.00 suggested by the system.
System response
You currently cannot enter an amount that is smaller than that expected by the system. This would lead to a credit memo for the vendor.
Procedure
You can change the default values to correspond to the invoice and then post the invoice.
Regards,
Hari.

Answer 1

Hi,
Please check if the PO is GR based invoice verification is checked.
since the GR is only done for the partial qty while you enter the invoice and reducing it system is giving the error.
If vendor sends a higher amount /qty when compared to PO you can try for a reduction.
for more information on when and how an invoice reduction need to be done,please check the below link.
http://help.sap.com/erp2005_ehp_04/helpdata/EN/a8/b99284452b11d189430000e829fbbd/frameset.htm
and http://help.sap.com/erp2005_ehp_04/helpdata/EN/d6/36451bca1a4a81b974bb9114e41458/frameset.htm
and
http://help.sap.com/erp2005_ehp_04/helpdata/EN/a8/b9975e452b11d189430000e829fbbd/frameset.htm
Regards,